Which rank corresponds to O-10?

• A. Brigadier General
• B. Lieutenant General
• C. Major General
• D. General

Answer: (D)

In this system, officer ranks are shown with an O- designation, and the number climbs as you move up the hierarchy. The rank with four stars is the top standard four-star level, known simply as General. The preceding ranks—one star, two stars, and three stars—are Brigadier General, Major General, and Lieutenant General, all below the four-star level. There is a five-star title, General of the Army, but that appears only in special wartime contexts and isn’t part of the regular O-10 sequence. So the correct O-10 rank is General.